Sectional furnace casing



June 23, 1925.

G. HARA/lsA ET Ai.

SECTIONAL FURNACE CASING Filed Nov. 25, 1921 2 sheetssmet ,1

June 23, 1925.

G. HARMS ET AL SECTIONAL FURNACE CASING 2vSheets=Sheet 2 Patented .lune23,' 1925'.

UNITED STATES PATENT orifice.

GEORGE HARM'S AND ROY C. W'ALKER, OF PEYORIA, ILLINOS.

SECTIONAL FURNACE CASING.

Application filed November 25, 1921. Serial No. 517,470.

Gur invention relates to furnaces, and` more particularly to theso-called one-register furnaces. Our invention in particular relates tothe casing which surrounds the furnace proper of a one-register furnace,said casing being formed of a plurality of sections with the resultattained that ease of shipment is provided, and no particular skillrequired inr the assembly thereof.V i

A. further object of our invention is in the particular formofconstruction of the casing sections, in combination with a special meansfor holding said sections in a unitary structure.

Still other objects of our invention will appear in the followingspecification in connection with the annexed drawings, in which;

Figure 1 is a front elevation of a onci'egister furnace with a portionthereofV shown in section.

Figure 2 is a cross-sectional View thereof.

Figure 3 is an enlarged detailed showing of the band or band members andtheir special form of mounting.

Figure 4l is an enlarged detail of the base ring showing the mounting.of the casing sections thereon.

Figure 5 is a front elevation of one of the casing sections.

Figure 6 is a plan-view thereof.

Figure 7 is a perspective of one of the sections.

Figure 8 is an enlarged detail, showing the particular form ofconstruction of the joints between the adjoining sections.

Figure 9 is a plan view of the register.

Referring to vthe drawings, in which, Figure l is illustrative of theone-register furnace, we find the furnace proper designated generally asA. The casingl generally for this furnace is designated as B, but theparticular construction of this casing which forms the basis of thisapplication will be later described. A single register is shown atC.Communication between the furnace and the single register is providedprimarilyT by the inner conical section 10, which communicates with acylindrical section 11, in connection with the register, or rather theheat portion thereof. Air surrounding the furnace, which is warmedthereby, passes through the above. sections and out the register asindicated by the arrows. A second transition section 12 is connected tothe outer portion of the casing B, and a squared sec= tion 13 also hasengagement with the single register, with the result that cold air mayreturn to the furnace through the conduit formed by the relativesections, taking" the direct-ion of the arrows. The vfoiwvard p tion ofthe furnace shown at D includes a.

ring lis attached at either side of the for-`V ward portion of thefurnace, said base ring surrounding` the furnace proper at a determineddistance' therefrom. Upon this base portion or ring are stood aplurality of casing sections, the section in detail being; shown inFigure 6 of the drawings.

These casing sections are made up of 'the following elements: K

A circular inner sheet 15 forms the inner wall of the section but doesnot extend entirely tof the bottom thereof. ThisV inner sheet is curvedin form asis the outer wall 16 of the section. Theouter wall extendsslightly lower than the inner wall, but only far enough to engage thebase ring in the manner shown in detail in Figure 4 of the drawings. Thetwo side walls 17 and 18 of the casing section engage the inner andouter walls in the particular manner shown in Figure G of the drawings.rIhe side wall 17 has its upper portion cut away as at 19 in order thatit may be engaged by the lip 2O on the side wall 18 of a relatedsection. The side wall 17 has the flange 21 extending therefrom, formedby its engagement with` the outer wall, and this flange provides anadded means for positioning the plural sections. As was said before, alip 20 is formed by an upper portion of the wall 18 being cut away andbentvdownwardly as at 22. A'

lip 23 similar to the lip 2O is formed on the lower edge of the side 17and provides a lower attachment means for an adjacent section. A thirdwall Y24 is shown spaced from the inner wall at a comparatively shortdistance, said wall conforming to the shape of said inner wall andhaving substantially the saine relative length. rllhis third wall hasthe particular engagement with the side and formed between the inner andthird walls of` the casing sections acts as an insulator ornon-conductor of heat between the'heated space about. the. furnace andthe cool air shaft or conduit'QS .in connection with the register;llVithin the contemplation of this invention vis the provision of anon-.conductor chamber ofthe form just described which is filled with anasbestos-insulator 27' shown partially in the non-conductor chamber inFigure 6 ofthe drawings. isV was stated before, the casing sections arestood upright upon the base` ring lll, the sidewalls of each section.being cut. away asatl28 for engagement with the ring. l'n Figure 4t ofythe drawings, a detail of the engagement of the casing section with thebase ring is shown. The plurality of casing sections, due to theirparticular form and relative engagement portions, may be stood upyaroundv this base ring without any further con-nectingmeanstherebetween, but inorder to iusure a more unitary structure, the bandmembers or bands 29 are provided. Inv F igure i of the drawings asingle-band-is'all that is required, in that the base ring is formed vinsuch manner that it actsas a base forl saidouter band. ln Figure 3 ofthe drawings, an inner. and outer band are shown, not only acting as ameans for tying the: plurality of sections securely together, but also,as a means for attaching the outer transition. section l2 thereto. Anymeansv may be used for attaching and drawin(T the bands"- to theforwardportion or plate of th'eY furnace. ln Figure 3 Vof the drawings,at130 andr'l may be-seen the particular meansrof attaching the innerconical lsection and-section 25 respectively to the upper portion ofthey casingsectionsait, of course, beingfnecessary to construct theupper portion of! theffurnace in connection with the registe-rafter thepluralityof casing sections have'been-setup.` Anexitfor the iin-burntfuel portions `ofthe furnace islshown at. 33.

lVhat we. claiml is:

l. A; hot air' furnace having in combinationy av heater unit, aregister, a casing spaced from and surrounding the heater unit to form ahot-'air passage, the said casing including a plurality of sectionunitsdetachably secured together', each section unit comprising an outerwall substantially coextensive` inheight with the heater' unit, an innerwall parallel to said outer wall and terminating above the lower edgethereof,

and an intermediate wallv coeXtensive in length with the inner wall andspaced therefrom to form an insulating compartment for' the hot airpassage, a passageway connecting the register with the passage formed bythe outer' and intermediate walls of thecasing whereby cool air iscirculated downwarr ly through tl'e casing, and a passageway connecting'the register' with the space between theinner wall of the casing and theheater unit whereby the cool airis carried past the heater unit andIheatedthereby.

2. A hot air furnace having in combination -a heater' unit, register', acasing spaced from and surrounding the heater unit to provide a passageforthe upwa'di circulation of air, said casino' includingv a pluralityof` separable interlocking section units, each of said section unitscomprising anV outer' wall, an inner wallspacedvtherefrom and anintern'iediate wall adapted to forni a main aiil passage,l with theouterwall for. the downward circulation of air, and an insulatingchamber with the inner wall,` the said inner' and intermediate wallsterminating abo-ve the lowerl edge ofv the outer wall wherebycommunication between the downward circulating air, passage and theupwardly circulating air passage is established, and passagewaysconnecting said air passages to said register..

3. A hot` airv furnace havingY in combination aheater unit, La register,a casing spaced from and surrounding the heater' unit toprovide apassage for the upward circulation of air, saidcasing.including aplurality of separable interlocking section unit, each of said sectionunits comprising an outer wall, arr-inner wall spaced. therefrom, and anintermediate wall adapted .to

form a main air passage with the outer. wall:

for the downward circulationv of air, and an insulating chamber with theinner wall, the said inner and intermediate walls terminating above thelower'. edgefof the outer' wall, whereby communication between thedownwardly circulating air passage and th upwardly circulating air'passage is estab lished, passageways connecting said air pas sages to`said register, and means for locle ing said casing scctionstogether.

4. A hot airA furnace having in combina- Vtion, a heater unit, aregister, acasingsurrounding said heaterrunitand spaced th-ercfromtoprovide anv inner air passage, the said casingV comprising a pluralityof separable sections, eachof said sections having an outer wallsubstantially coextensive in height with the heater unit, aniinner wallspaced from the outer wall, side walls connecting the outer and innerwalls together', and an intermediate wall adapted to form with the outerwall an outer air passageway, and an insulating chamber with the.

cation between the lower ends of the outer and inner air passages, apassageway connecting the inner air passage with the central portion oi'4the register, and a passageway connecting the outer air passage withthe edge portions of the register.

5. A hot air furnace having in combination, a heater unit, a registenacasing surrounding said heater unit and spaced therefrom to provide aninner air passage, the said casing comprising a plurality of separablesections, means for interlockingadjacent. sections together, each ofsaid sections having an outer wall substantially coextensive in heightwith the heater unit, an inner wall spaced from the outer wall, sidewalls connecting the outer and inner walls together, and an intermediatewall adapted to form with the outer wall an outer air passageway, and aninsulating chamber with the inner wall, the said inner andii'itermediate walls being 'formed to provide a communication betweenthe lower ends of the outer and inner air passages, a passagewayconnecting the inner air passage with the central portion ot' theregister, and a passageway connecting the outer air passage with theedge portions of the register.

6. A hot air furnace having in combination, a heater unit, a register, acasing surrounding said heater unit and spaced therefrom to provide aninner air passa-ge, the said casing comprising a plurality of sepa-Vrable sections, meansi'or interlocking adjacent sections together, eachof said sections having an outer wall substantially coeXtensive inheight with the heater unit, an inner wall spaced from the outer wall,side walls connecting the outer and inner walls together, and anintermediate wall adapted to form with the outer wall an outer airpassageway, and an insulating chamber with the inner wall, the saidinner and intermediate walls being formed to provide a communicationbetween the lower ends ot the outer and inner air passages, a passagewayconnecting the inner air passage with the central portion of theregister, a passageway connecting the outer air passage with the edgeportions of the register, and means for securing the casing in position.

In testimony whereof they affix their signatures.

GEORGE Hanns. nor c. WALKER,

